Quality

New protocols identify solar cell failures during production

Two new pass/fail protocols are said to be able to separate cells which present high hot-spot possibility, show high current leakage and demonstrate intermediate behavior. The sorting technique relies on a manual solar simulator, an infrared camera and a tool to measure isolation.

pv magazine video: Higher yields are possible

The first session of the pv magazine Virtual Roundtables Europe on June 9 showed that the performance of PV arrays can be boosted with effective measures – proving it’s more than just theoretical. The evaluation of a portfolio of 70 plants prompted a performance boost of 8.4%. The video of the event is now online.

Premature inverter failure – 4.2 GW of capacity will be affected this year, says analyst

U.S.-owned business intelligence firm Wood Mackenzie has attempted to evaluate the market opportunities offered by the repowering of solar projects around the world which feature inverters which are 10 years old – as well as those which will expire ahead of time.

The weekend read: Pirates of the PV industry

Product piracy is a well-known threat in many industries, and in solar the risk posed by poor quality products from disreputable manufacturers making their way onto rooftops and other PV installations should not be underestimated. With manufacturers investing in solutions to protect against inferior products bearing their logo, pv magazine looks at the size of the problem.

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pv magazine’s Roundtables go virtual and reach a global audience

The COVID-19 pandemic featured prominently at this week’s inaugural pv magazine Virtual Roundtables Europe, which took place this past Tuesday and Wednesday. Not only did the pandemic lead to the virtualization of pv magazine’s established June Roundtables, but it was a big topic in the final session on Wednesday dealing with markets and specifically the further development of Power Purchase Agreements (PPAs) in Europe.

French bifacial standards measure up

A global assessment of bifacial testing methods conducted in Singapore has endorsed the approach taken by France’s Institut National de l’Énergie Solaire.

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Minimum mono Perc standards could halt Chinese production boom

The authorities in Beijing, concerned at ever greater solar production capacity announcements and oversupply fears, are preparing to introduce standards which would bring the recent mono Perc production explosion to a shuddering halt.

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Discussion on performance ratio as a KPI for service providers

The performance ratio of an installation is stable, yet the yield and the revenues drop significantly. A U.K. case study shows that faults can compensate for performance ratio value, meaning this value is not always a good key performance indicator on its own. This issue will be discussed during the upcoming asset management session at the pv magazine virtual roundtable Europe 2020.

Choosing representative strings for measuring power loss

Analyzing monitoring data does not always accurately identify under-performing assets; and when investigating supposed power loss with IV-curve measurements, a representative sample via thermography should be selected. These are two conclusions drawn from a case study, which will be discussed during the upcoming asset management session at the pv magazine virtual roundtable Europe 2020.

Investigating backsheets and ultraviolet stability

Five testing laboratories led by Germany’s Fraunhofer ISE have begun a ‘round robin’ project to test the effects of ultraviolet light on polymer backsheet materials. Initial results indicate a route to accurate accelerated testing of backsheet UV stability over module lifetimes of 20 years-plus.

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